Cistern cut-off



(No Model.)

G. W. 8v W. LAWHON.

GISTERN GUT-OPP.

No.' 330,410. Patented Nov. 17, 1885.

l [mi E311.

WITJVESSES UWM/wlw IlNrrnn g, ATENT Erica.

GEORGE W. LAVHON AND WILLIAM LAWHON, OF KNOXVILLE, TENNESSEE.

CISTERN CUT-OFF.

SPECIFICATION forming part of Letters Patent No. 330,410, dated November17, 1885.

Application filed Sepiembcrl, 1885. Serial No. 177,461. (No model.)

To all whom it may concern:

Be it known that we, GEORGE W. LAW- HoN and WILLIAM LAwHoN, citizens ofthe United States, residing at Knoxville, in the county of Knox andState of Tennessee, have invented a new and useful Improvement inGistern Cut-0ft`s, ot' which the following is a speciiication, referenceVbeing had to the accompanying drawings.

Ourinvention rilites to an improvement in cistern cut-offs; and itconsists in the peculiar construction and combination of devices, thatwill be more fully set forth hereinafter, and particularly pointed outin the cla-im.

In the drawings, Figure l is a perspective View of' a cistern cutoffembodying our invention, partly broken away to disclose the interiorarrangement. Fig. 2 is a vertical sectional View of the same.

A represents avertical pipe that leads from the eaves-troughs of a houseand communicates at its lower end with a discharge-pipe, B, for theimpure water that runs from the roof at the beginning of a rain, andwith a pipe, C, that leads to a cisteru to supply the latter with purerain-water.

D represents a hollow rock-shaft journaled transversely below the pipeA, and between the upper ends of the pipes B and C.

E represents a cut-off valve that is concave on its upper side and` hasits ends rounded, as shown. rThis valve is secured transversely on therock-shaft, the latter being located at the center thereof', and thevalve is provided with a central bottom opening, @,'that communicateswith the hollow rockshaft. An arm, F, is secured to one of theprojecting ends of the rock-shaft, at right angles to said shaft, and aweight, G, is attached to the outer end of the arm to normally tilt thevalve and cause the latter to cut oft' the pipe C and connect the pipe Awith the dirty-water pipe B. A hollow arm, H, is attached to andcommunicates with the hollow rock-shaft, and extends therefrom in asubstantially opposite direction from the arm F, at an angle of aboutone hundred and thirty-live degrees therefrom. The arm H is somewhatlonger than the arm F, and at its outer end is secured a water-chamber,I, with which the arm H communicates. This chamber is provided at asuitable point with openings t, through which the water in the chambermay leak out slowly. At the beginning of a rain the water from the roofis fouled with dust and dirt on the roof, and this impure water isdirected by the valve out through the pipe B. A portion of the waterpasses through the opening thus cutting off the pipe B and directing thewater from the pipe A into the pipe C to the cistern. The openings tpermit the water to leak slowly from the water-chamber, but not so fastas it is supplied during the rain. When the rain is over, the water inthe waterchamber leaks out until the weighted arm .overbalances it, whenthe valve is tilted to its initial position, ready to direct the firstdirty Water of the next rain away from the cistern, as before.

Having thus described our invention, we claim- The combination of thepipe A and the discharge-pipe and cistern-supply pipe communicatingtherewith, the hollow rock-shaft, the cutoff valve secured to saidshaft, and having the central bottom opening communicating therewith,the weighted arm F, attached to the rock-shaft-,to tilt the Valve andcause 1t to cut off the supply-pipe normally, and the hollow arm H,connected to the hollow rock-shaft, and the water-chamber I on the arm Hand having the leak-openings t, substantially as described.

In testimony that we claim the foregoing as our own we have heretoaftixed our signatures in presence of two witnesses.

y hi encuen w. s LAwHoN.

mark.

GEO. ADNEY.

